Combination gas fired incinerator and charcoal broiler



July 17, 1962 G. w. FRANZHElM 3,044,421

COMBINATION GAS FIRED INCINERATOR AND CHARCOAL BROILER 3 Sheets-Sheet 1Filed May 25, 1960 m E R 1 S N ,R MW W F1 ,A W E 1 G I// m G H 3 F 9 f 8-i p a y 3 2 COMBINATION GAS FIRED INCINERATOR AND CHARCOAL BROILER IFiled May 25, 1960 3 Sheets-Sheet 2 July 17, 1962 G. w. FRANZHEIYM 56 ZA, R 7 O W KW/8 63/ X M I 5 m i All!!! I!!! III!!! IIIIIIIII I GEORGE W.FRANZHEIM O as 2 m i ga -in x K I) :1 a a m ,4 a a; x o 3 7a 2 3ATTORNEYS.

July 17, 1962 G. w. FRANZHEIM COMBINATION GAS FIRED INCINERATOR ANDCHARCOAL BROILER 3 Sheets-Sheet 3 Filed May 25. 1960 GEORGE W.F'RANZHEIM INVENTOR Fig.

ATTORNEYS United States Patent 3,044,421 COMBINATION GAS FKREDINCINERATOR AND CHARCOAL BROILER George W. Franzheim, Box 1, Valencia,Pa. Filed May 25, 1960, Ser. No. 31,719 Claims. (Cl. 110--8) Thisinvention relates to a combination gas fired incinerator and a charcoalbroiler.

Anobject of the present invention is to provide a gas fired incineratorhaving a removable retort, which latter can be removed and used as acharcoal broiler.

Another object of the present invention is to provide a gas firedincinerator in which complete combustion is obtained, thereby avoidingthe production of carbon monoxide.

A further object of the present invention is to provide a gas-firedincinerator which is smaller in size and lighter in welght than theknown incinerators of the prior art through the use of asbestos as theheat insulating medium, instead of fire brick or ceramic material.

A still further object of the present invention is to provide a gasfired incinerator which has a removable retort wherein the heat ofcombustion is generated and shortly conducted to a chimney or flue.

An additional object of the present invention is to provide a gas firedincinerator which will develop a minimum of 1samoke when burning eithergarbage or household tras Still other objects, advantages andimprovements will become apparent from the following specification takenin connection with the accompanying drawing, in which:

FIGURE 1 is a rear end elevational view of the combination gas firedincinerator and charcoal broiler according to the present invention.

FIG. 2 is a side elevational view of the combined gas fired incineratorand charcoal broiler.

FIG. 3 is a vertical sectional view, taken on the section line 33 andlooking in the direction of the arrows, through the combined gas firedincinerator and charcoal broiler.

FIG. 4 is a partial vertical sectional view, similar to FIG. 3, throughthe combined gas fired incinerator and charcoal broiler, showing thedoor in partially open position.

FIG. 5 is a partial front end elevational view of the combined gas firedincinerator and charcoal broiler.

FIG. 6 is a front end elevational view of the retort for the combinedgas fired incinerator and charcoal broiler.

FIG. 7 is a top plan view of the grill used in the retort.

Referring now to the drawings in detail and to FIG. 3 in particular, thegas fired incinerator is here shown as enclosed by a housing. Thishousing is comprised principally by two concentrically positioned shellmembers 19 and 12. Between the shell members 10 and 12 there is anannulus 11 of asbestos. A front end plate 13 has concentricallypositioned annular flanges 14 and 15 adjacent and at its periphery,respectively, between which the concentric shell members 10 and 12 arereceived. A flue opening 16 is formed in this end plate and issurrounded by a collar 17 for the attachment of a stove pipe, thiscollar being secured to the end plate by screws or rivets 13. Adjacentits bottom the front end plate 13 has an opening 19 therein for thereception of the burner assembly, to be later described. At its bottomthe front end plate has integrally formed feet 2li20 thereon. The innerface of the front end plate within the area surrounded by the innerannular flange '14, except over the openings 16 and 19, is covered by alayer 21 of asbestos.

A rear end plate 23 has concentrically positioned annular flanges 24 and25 thereon adjacent and at its periphcry, respectively, between whichthe concentric shell members 10 and 12 are received. This rear end platehas an enlarged central opening 26 therethrough and at its bottom it isformed with integral feet 27.

A circular door 28' has a concentrically positioned an-. nular flange 29thereon, which is adapted to be received within the enlarged controlopening 26 in the rear end plate 23. Over the area within the annularflange 29 there is placed on the inner face of the door 28a layer 36 ofasbestos. The door 28 is pivotally mounted on the incinerator by a hingearrangement, which latter is comprised by ears 3131 on the door, lugs33-33 on the feet 27-27, and pins or bolts 32 connecting each car 31 tothe corresponding lug $3. Adjacent its top the door 23 is provided witha handle 35, which is secured thereto by bolts or rivets 34. A catch 38is pivotally mounted on top of the outer shell 12 of the incineratorbetween parallel ears 3636 on the latter by a bolt 37 extending throughthe ears and the catch, and serves to normally hold the door 28 in theclosed position.

Parallel rail members 40-44) in the fonm of angle members are mountedwithin the inner shell member 10 between the front end plate 13 and therear end plate 23, in chordally spaced relationship with the inner shellmember.

The burner housing is open at its rear end to register with the opening19 in the front end plate 13. The bottom plate 41 of the burner housingis elongated and extends beneath the parallel side rails 404-40, beingslidably mounted on brackets 3Q-39, which are secured to the wall of theinner shell member Iii, as by welding. In such position the elongatedbottom plate forms the floor of the flame duct, to be later described. Afront wall 42 extends for only a part of the height of the burnerhousing and the side walls 43-43 are slanted from the top of the rearopening 19 to the top of the front wall. The holes 44 are provided inone side wall 43 of the burner housing for two gas supply tubes, to belater described. A cover 46 fits over the slanted sections of the sidewalls 4343. This cover is of expanded metal lath and provides for theadmission of .air to support combustion in the incinerator. The cover ishinged to the front wall 42 at 45, and has a knob 47 thereon adjacentits opposite side for swinging same to and from the closed position.

A pipe 79' leads from a gas main (not shown) to the main gas valve whichis timer actuated and thermo statically controlled. From the main gasvalve 80 a pipe 42 extends through one of the holes 44 in one of theside walls 43 of the burner housing and is supported from the side wallby a bracket 48. This tube admits gas under pressure from the valve 86,which is set according to the kind and amount of trash to be burned.Aligned with the exit opening of the tube 49 there is a Venturi tube 5iwhich latter is supported from the front end plate 13. Two gas lines 51and 52 enter the burner housing through one of the holes 44 in the sidewall 43 and extend to a point opposite the exit endof the Venturi tube59 where they are supported by a bracket 53. This bracket is in turnmounted on one of the parallel side rails 40. The line 51 is the gassupply for the pilot light 51'. The line 52 extends from a closed tube52, which is positioned in front of the pilot light 51, back to thecontrol valve 80. The tube 52' contains a volatile insert gas. Whenheated by the pilot light 51, this gas expands and causes thethermostatically controlled valve 80 to open. When the pilot light goesout, the gas contracts and allows the valve 80 to close.

The retort is shown in FIGS. 3 and 6. It is principally made of sheetmetal, preferably Nicroloy. The latter is a very high heat resistingstainless steel, having a 7 wall 66 and a top 67.

large percentage of chromium or nickel. It has a melting point of 3000F. and a recalescent point of about 2800 F.,- whereas the normaloperating temperature of the incinerator should not exceed 1500 F. Theretort is of metal parallelepiped shape. It hassides 5454, ends 5656,and a bottom 57.- A closure is provided in the form of two plates .5858,each adapted to cover half the top area on the opposite side of thelongitudinal center line and each having a downwardly depending flange59 along one side at both ends, which flange is adapted to receive theupper parts of the sides 54-54 and the ends 5656, when the closure is inthe operative position. The closure plates 58-58 are mounted on therespective side walls 5454 by hinges 61-61. At spaced intervals in theside walls 54-54 there are formed holes 55 which admit air to supportcombustion.

Inverted L-shaped lugs 60-60 are welded to the bottom 57 of the retort.These lugs are so positioned that their downwardly depending flanges areadapted to be received within the upwardly extending flanges on therails 4040, when the retort is in place within the incinerator. One endwall 56 of the retort is provided with For use as a garbage or trashburner it will be understood that the incinerator is connected to theflue opening in a chimney by asuitable pipe which surrounds the collar17 on the front end wall13. The garbage or trash to be burned is placedwithin the retort and the latter within the incinerator. The flame fromthe burner 50, passes through the flame duct comprised by the side walls64-64 and top 65 of the lengthwise extending re-entrant bottom of theretort and the elongated bottom 41 of the burner housing, the spacebetween the door 28 of the incinerator and the rear end wall 56 of theretort, and

. into the space between the inner shell member 10 of the incineratorand the closure 5858 of the retort, in the manner of a reverbatoryfurnace. From the space hetween'the inner shell member 10 of theincinerator and the closure 5858 of the retort, the flame passes out ofthe opening 16 in the front wall 13 of the incinerator and the connectedpipe (now shown). Part of the flame is diverted, going through thevertically positioned reentrant portion at the rear end of the retort,through the holes 68 in the side walls 64A64A, and top 67 of thisre-entrant portion, and into the retort itself, where coma pull handle62, which is spot-welded, thereto, for withdrawing the retort from theincinerator. When the retort is in position within the incinerator, itabuts astop 22 in the form of an angle member positioned interiorly andchordally of the front end plate 13.

Along its longitudinal center line the bottom plate 57 of the retort isformed with a lengthwise extending reentrant duct, comprised by sideWalls 6464, parallel respectively to the side walls 5454 of the retortand a top 65. The side walls tit-64 and top 65 form, along with thebottom plate 41 of the burner housing, a flame duct. At the end of theretort which faces the rear end 23 of the incinerator, there is provideda second and vertically extending re-entrant duct, which is comprised byextensions 64-A, 64-A of the side walls 64-64, end Holes 68 in the endwall 66 and top 67 provide for the admission of flames to the retort.The gases of combustion pass out of the retort through a hole 69 in thefront end wall 56, which faces the front end wall 13 of the incineratorand approximately registers with the hole 16 in the latter, when theretort is in position within the incinerator. The hole 69 is surroundedby a collar 70, to which a stove pipe (not shown) may be connected, aswill later be described.

The griddle is shown in FIG. 7. It is comprised principally by areticulated member, formed of pairs of lengthwise extending rods 72-72and 7373 and cross rods 74, suitably welded to the pairs of rods 72-72and 7373 at the points of cross over. The centrally positioned rods 7373are formed from a single element, which latter is suitably bent in threedimensions to form a pull handle 75. Side wings are comprised by plates7676, each of which has a flange 77 along its ends and 1 'the inneredge.

The sidewings 76-76 are secured to the outer longitudinally extendingrods 72-72 of the griddle by hinges 7878, and the side wings are of suchwidth that they approximately abut along their outer edgeson thelongitudinally center line of the griddle, when folded onto the latter.

-The outstanding feature of the incinerator according to the presentinvention is that it may be readily disassembled in a few seconds byremoving the retort. This is possible because of the slidable mountingof the retort on the side rails 4040 and theswingable door 28. With theretort removed, all inside surfaces, including, of course, the corners,can be thoroughly cleaned. This is in marked contrast to theincinerators available from commercial gas distribution companies. Thelatter are invariably ceramic lined and they cannot be disassembled andcleaned. After same have had a few weeks or months of use unburned fueland grease accumulate in inaccesssible cracks and corners, and theresultant odors attracts vermin, roaches, rats, mice, ants, etc.

bustion takes place. Air for supporting combustion at the burner entersthrough the holes 4444 in the side walls 43 of the burner housing andgoes partly to the combustion chamber comprised by the side walls 6464,and top 65 of the re-entrant bottom of the retort and the elongatedbottom 41 of the burner housing. The air in part also goes through thespace between the front wall 13 of the incinerator and the front wall 56of the retort, through the spaces between the inner shell member 10 ofthe incinerator and the side walls 54-54 of the retort, through theholes 55 in these side walls and to the interior of the retort, where itsupports combustion. The gaseous products of combustion pass out of theretort through the hole 69 in the latter, the registering hole 16 in thefront end wall 13 of the incinerator and the connecting pipe (notshown).

Carbon monoxide is eliminated from the products of combustion by what ishere termed the after-burning effect. Air in excess of that required tosupport combustion also passes with the flames through the ductcomprised by the side walls 6464 and top 65 of the mentrant bottomportion of the retort and the elongated bottom 4-1 of the burnerhousing, through the holes 68 in the side walls 64A64A, the end wall 66and the top 67 of the vertically positioned re-entrant portion of theretort, and into the retort itself. In passing through the lengthwiseextending duct comprised by the side walls 6464 and the top wall 65ofthe re-entrant portion of the bot tom of the retort that air becomespre-heated. The preheated air meets with the burning gaseous products ofcombustion within the retort and any incompletely burned components ofthese products, such as carbon monoxide, are there fully burned.

The retort may be removed from the incinerator and used out in the yardas a deep fire broiler for broiling steaks. Due to its light weight, itmay be taken on a picme and used for the same purpose. Charcoal may beplaced within the retort and ignited in the usual manner, such aspouring lighter fluid over the same and touching a'match. The closureplates 58-58 are swung to the horizontal position, where they are inapproximately the same horizontal plane as the tops of the side walls5454 and end walls 5656 and are held in this position by the flanges5959 along their inner edges abutting the The griddle 74 is then placedover. the open top of the retort, with the wings 76-76 resting on theout-turned closure plates 5858 respectively; :For fast broiling, thewings 7676 are folded over the steaks; for slower broiling, the wingsmay be left in the position shown in FIG. 7, that is spread out. In suchposition, the griddle 74 and wings 76-76 have a combined area abouttwo-thirds of a square foot, and will hold up to three (3) porterhousesteaks at a time, if the latter are properly first trimmed to size. Thesteaks can be completely broiled within twenty (20) minutes of the timeafter the first has been lighted.

Due to the deep fire feature, that is the area of combustion beingconsiderably below the steak being broiled, the fat which runs out ofthe meat will not catch on fire and deposit a sooty coating on the meat,as is the case with the conventional shallow charcoal broilers on themarket.

The retort may be used within the incinerator for the indoor broiling ofsteaks in the above described manner, except that the closure plates5858 cannot be left in the outwardly swung position shown in FIG. 7, butmust be folded over the top of the retort, before the latter is placedwithin the incinerator. It may also be used outside of the incineratorfor the indoor broiling of steaks, again in the above described manner,if a suitable pipe is connected to the collar 70 on the retort andextended to the flue opening in a chimney.

Having now fully described my invention, what I claim as new and usefuland desire to secure by Letters Patent of the United States is:

1. An incinerator comprising a cylindrical double side wall with heatinsulating material therein, an end wall with heat insulating materialthereon closing one end of the incinerator and having an exit opening atits top for the gaseous products of combustion, a door also with heatinsulating material thereon closing the other end of the incinerator, aburner positioned in the bottom of the incinerator, rails extendinglengthwise of the incinerator between the end wall and the door, a rightangle parallelepiped retort in said incinerator having holes in its sidewalls, and a channel longitudinally of its bottom extending from theburner to the door, pivoted complementary closures on said retort, andlugs on the bottom of said retort engaging the rails for slidablypositioning the retort within the incinerator.

2. An incinerator comprising a cylindrical double side wall with heatinsulating material therein, an end wall with heat insulating materialthereon closing one end of the incinerator and having an exit openingadjacent its top for the gaseous products of combustion, a door alsowith heat insulating material thereon closing the other end of theincinerator, a burner positioned in the bottom of the incinerator, railsextending lengthwise of the incinerator between the end wall and thedoor, a right angle parallelepiped retort in said incinerator havingholes in its side walls and a flame duct through its bottom extendingfrom the burner to the door comprised by walls spaced inwardly from andparallel to the side walls of the retort and a top spaced above andparallel to the bottom of the retort, pivoted complementary closures onsaid retort, and lugs on the bottom of said retort engaging the railsfor slidably positioning the retort within the incinerator.

3. An incinerator comprising a cylindrical double side wall with heatinsulating material therein, an end wall with heat insulating materialthereon closing one end of the incinerator and having an exit openingadjacent its top for the gaseous products of combustion, a door alsowith heat insulating material thereon closing the other end of theincinerator, a burner positioned in the bottom of the incinerator, railsextending lengthwise of the incinerator between the end wall and thedoor, a right angle parallelepiped retort in said incinerator havingholes in its side walls and a flame duct comprised by walls spacedinwardly from and parallel to the side walls of the retort and a topspaced above and parallel to the bottom of the retort, a re-entrantflame duct at one end of the retort comprised by upward extensions ofthe side walls of the flame duct having holes therein, an end wallspaced inwardly from the adjacent end wall of the retort, and a toppositioned above the top of the flame duct, pivoted complementaryclosures on said retort, and lugs on the bottom of said retort engagingthe rails for slidably positioning the retort within the incinerator.

4. An incinerator comprised by a cylindrical double side wall with heatinsulating material therein, an end wall with heat insulating materialthereon closing one end of the incinerator and having an exit openingadjacent its top :for the gaseous products of combustion and a burneropening adjacent its bottom, a door also with heat insulating materialthereon closing the other end of the incinerator, rails extendinglengthwise of the incinerator between the end wall and the door, aburner housing over the burner opening in the end wallhaving anelongated plate thereon extending beneath said rails, a right angleparallelepiped retort in said incinerator having holes in its side wallsand a flame duct through its bottom comprised by walls spaced inwardlyfrom and parallel to the side walls of the retort and extending upwardlyfrom the elongated plate on the burner housing and a top spaced aboveand parallel to the bottom of the retort, pivoted complementary closureson said retort, and lugs on the bottom of said retort engaging the railsfor slidably positioning th retort within the incinerator.

5. An incinerator comprising a cylindrical double side wall with heatinsulating material therein, an end wall with heat insulating materialthereon closing one end of the incinerator and having an exit openingadjacent its top for the gaseous products of combustion, a stop on saidend wall, a door also with heat insulating material thereon closing theother end of the incinerator, a homer positioned in the bottom of theincinerator, rails extending lengthwise of the incinerator between theend wall and the door, a right angle parallelepiped retort of lesserheight than the diameter and lesser length than the length of theincinerator and having holes in its side walls and a flame duct throughits bottom extending from the burner to the door comprised 'by wallsspaced inwardly from and parallel to the side walls of the retort and atop spaced above and parallel to the bottom of the retort, pivotedcomplementary closures on said retort, and lugs on the bottom of saidretort engaging the rails for slidably positioning the retort within theincinerator and against the stop on the end wall to provide a continuousflame passage through the flame duct in the bottom of the retort,between the door and the adjacent end wall of the retort, and betweenthe top of the incinerator and the top of the retort to the exit openingin the end wall.

References Cited in the file of this patent UNITED STATES PATENTS Re.19,214 Howle June 19, 1934 924,315 Buehring June 8, 1909 1,050,317Watson et al. Jan. 14, 1913 1,147,189 Rue July 20, 1915 1,265,627 DickeyMay 7, 1918 1,724,575 Graver Aug. 13, 1929 1,836,894 Bedigain Dec. 15,193.1 1,878,110 Cole Sept. 20, 1932 1,847,004 Grinter Feb. 23, 19322,127,328 Egan Aug. 16, 1938 2,424,665 Pope July 29, 1947 2,560,184Norman July 10, 1951 2,616,360 Thompson Nov. 4, 1952 2,598,067 OBrienMay 27, 1952 2,802,434 Dowse Aug. 13, 1957 2,927,524 Luff Mar. 8, 19602,985,164 Imoto May 23, 1961

